An external lightning protection system safely conducts lightning current to ground. However, according to IEC 61312-1, up to 50% of the lightning current can enter the building through power, data, and grounding systems. SENTRON overvoltage protection devices provide a reliable complement by limiting overvoltages and protecting electrical installations and sensitive electronic equipment from damage, failure, and downtime.

Surge protection devices are required under standards such as IEC / EN 62305, IEC 60364-4-44, and IEC / EN 61643 wherever the effects of overvoltages may endanger people, damage property, or disrupt the electrical supply. A coordinated internal lightning and surge protection system is mandatory - or strongly recommended - for buildings with external lightning protection, sensitive electronic equipment, or applications where high system availability is essential.

The selection depends on factors such as the network system, installation location, lightning protection class, and the protection requirements of the connected equipment. The SENTRON portfolio offers a coordinated range of Type 1, Type 2, Type 3, and combined surge protection devices, enabling standards-compliant protection coordination from the building entry point to the terminal equipment level - efficiently, clearly, and tailored to the application.